stuff about Ganymede

Ganymede is a pretty big deal.Ganymede was discovered by Gallieo Ganymede.Ganymede is the largest satilletit in our solar system.Ganymede's age is the same as Jupiter.Jupiters age is about 4.5 billion years old,so is Ganymedes!All of this is all good info.Now go on and learn about the Skylab or somthing else in space..